tlehman

# http://www.evanmiller.org/bayesian-ab-testing.html implemented in ruby
# requires the distribution gem from https://github.com/clbustos/distribution (gem 'distribution', require: false)

def probability_b_beats_a(completed_a, total_a, completed_b, total_b)
  require 'distribution/math_extension'
  total = 0.0

  alpha_a = completed_a + 1
  beta_a = total_a - completed_a + 1
  alpha_b = completed_b + 1

tlehman

Pub/Sub pattern with PostgreSQL's LISTEN/NOTIFY command

This is a simple chat-like program using pub-sub pattern, backed by PostgreSQL's LISTEN/NOTIFY command.

Publish

publish message to foo channel from user nickname.

$ python pub.py foo nickname
PUBLISH to channel #foo

tlehman

graph = {}
ObjectSpace.each_object(Class) do |klass|
  sup = klass.superclass and graph[klass] = sup
end

puts "digraph{overlap=false;"
graph.map do |key, value|
  puts %("#{key}"\n"#{key}"->"#{value}")
end
puts"}"

tlehman

#!/bin/bash

function today {
    echo `date +"%Y%m%d"`
}

function last_tag_today {
    output=`git tag`
    local last_today=''